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Journal Articles

Quantum phase transition and magnetic excitation in the $$S$$=1/2 Ising-like antiferromagnetic chain CsCoCl$$_{3}$$ in transverse magnetic fields

Kimura, Shojiro*; Onishi, Hiroaki; Narumi, Yasuo*; Okunishi, Koichi*; Hagiwara, Masayuki*; Kindo, Koichi*; Kikuchi, Hikomitsu*

Journal of the Physical Society of Japan, 94(12), p.124703_1 - 124703_8, 2025/12

https://doi.org/10.7566/JPSJ.94.124703
 Times Cited Count：0 Percentile：0.00(Physics, Multidisciplinary)

Journal Articles

Magnetic ground states of highly doped two-leg Hubbard ladders with a particle bath

Onishi, Hiroaki; Miyashita, Seiji*

Physical Review B, 111(17), p.174452_1 - 174452_15, 2025/05

https://doi.org/10.1103/PhysRevB.111.174452
 Times Cited Count：0 Percentile：0.00(Materials Science, Multidisciplinary)

Journal Articles

Application of diffusive gradients in thin films (DGT) for the dynamic speciation of radioactive cesium in Fukushima Prefecture, Japan

Tanaka, Takuro*; Fukuoka, Masafumi*; Toda, Kanako*; Nakanishi, Takahiro; Terashima, Motoki; Fujiwara, Kenso; Niwano, Yuma*; Kato, Hiroaki*; Kobayashi, Natsuko*; Tanoi, Keitaro*; et al.

ACS ES&T Water (Internet), 4(8), p.3579 - 3586, 2024/08

https://doi.org/10.1021/acsestwater.4c00453

Journal Articles

Analyses of hierarchical structures in SBR rubber by using contrast-variation SANS; Effects of a silane coupling agent

Nakanishi, Yohei*; Shibata, Motoki*; Sawada, Satoshi*; Kondo, Hiroaki*; Motokawa, Ryuhei; Kumada, Takayuki; Yamamoto, Katsuhiro*; Mita, Kazuki*; Miyazaki, Tsukasa*; Takenaka, Mikihito*

Polymer, 306, p.127209_1 - 127209_7, 2024/06

https://doi.org/10.1016/j.polymer.2024.127209
 Times Cited Count：9 Percentile：63.62(Polymer Science)

Journal Articles

Magnetic excitation in the $$S$$=1/2 Ising-like antiferromagnetic chain CsCoCl$$_{3}$$ in longitudinal magnetic fields studied by high-field ESR measurements

Kimura, Shojiro*; Onishi, Hiroaki; Okunishi, Koichi*; Akaki, Mitsuru*; Narumi, Yasuo*; Hagiwara, Masayuki*; Kindo, Koichi*; Kikuchi, Hikomitsu*

Journal of the Physical Society of Japan, 92(9), p.094701_1 - 094701_9, 2023/09

https://doi.org/10.7566/JPSJ.92.094701
 Times Cited Count：4 Percentile：44.65(Physics, Multidisciplinary)

Journal Articles

Low temperature behavior of itinerant ferromagnet realized in extended Nagaoka mechanism

Onishi, Hiroaki; Miyashita, Seiji*

JPS Conference Proceedings (Internet), 38, p.011157_1 - 011157_6, 2023/05

https://doi.org/10.7566/JPSCP.38.011157

Journal Articles

Finite-temperature properties of extended Nagaoka ferromagnetism; Ordering processes and precursor of a quantum phase transition between itinerant ferromagnetic and Mott antiferromagnetic states

Onishi, Hiroaki; Miyashita, Seiji*

Physical Review B, 106(13), p.134436_1 - 134436_13, 2022/10

https://doi.org/10.1103/PhysRevB.106.134436
 Times Cited Count：2 Percentile：4.34(Materials Science, Multidisciplinary)

Journal Articles

Sodium-cooled Fast Reactors

Ohshima, Hiroyuki; Morishita, Masaki*; Aizawa, Kosuke; Ando, Masanori; Ashida, Takashi; Chikazawa, Yoshitaka; Doda, Norihiro; Enuma, Yasuhiro; Ezure, Toshiki; Fukano, Yoshitaka; et al.

Sodium-cooled Fast Reactors; JSME Series in Thermal and Nuclear Power Generation, Vol.3, 631 Pages, 2022/07

https://shop.elsevier.com/books/sodium-cooled-fast-reactors/morishita/978-0-12-824076-2

This book is a collection of the past experience of design, construction, and operation of two reactors, the latest knowledge and technology for SFR designs, and the future prospects of SFR development in Japan. It is intended to provide the perspective and the relevant knowledge to enable readers to become more familiar with SFR technology.

Journal Articles

Excitation and transport of bound magnon clusters in frustrated ferromagnetic chain

Onishi, Hiroaki

Journal of Physics; Conference Series, 2207, p.012045_1 - 012045_6, 2022/03

https://doi.org/10.1088/1742-6596/2207/1/012045

Journal Articles

Optical selection rules of the magnetic excitation in the $$S$$ = $$frac{1}{2}$$ one-dimensional Ising-like antiferromagnet BaCo$$_{2}$$V$$_{2}$$O$$_{8}$$

Kimura, Shojiro*; Onishi, Hiroaki; Okutani, Akira*; Akaki, Mitsuru*; Narumi, Yasuo*; Hagiwara, Masayuki*; Okunishi, Koichi*; Kindo, Koichi*; He, Z.*; Taniyama, Tomoyasu*; et al.

Physical Review B, 105(1), p.014417_1 - 014417_9, 2022/01

https://doi.org/10.1103/PhysRevB.105.014417
 Times Cited Count：6 Percentile：35.41(Materials Science, Multidisciplinary)

Journal Articles

Spin excitations of the $$S$$=1/2 one-dimensional Ising-like antiferromagnet BaCo$$_{2}$$V$$_{2}$$O$$_{8}$$ in transverse magnetic fields

Okutani, Akira*; Onishi, Hiroaki; Kimura, Shojiro*; Takeuchi, Tetsuya*; Kida, Takanori*; Mori, Michiyasu; Miyake, Atsushi*; Tokunaga, Masashi*; Kindo, Koichi*; Hagiwara, Masayuki*

Journal of the Physical Society of Japan, 90(4), p.044704_1 - 044704_9, 2021/04

https://doi.org/10.7566/JPSJ.90.044704
 Times Cited Count：8 Percentile：51.68(Physics, Multidisciplinary)

Journal Articles

Repeatability and reproducibility of measurements of low dissolved radiocesium concentrations in freshwater using different pre-concentration methods

Kurihara, Momo*; Yasutaka, Tetsuo*; Aono, Tatsuo*; Ashikawa, Nobuo*; Ebina, Hiroyuki*; Iijima, Takeshi*; Ishimaru, Kei*; Kanai, Ramon*; Karube, Jinichi*; Konnai, Yae*; et al.

Journal of Radioanalytical and Nuclear Chemistry, 322(2), p.477 - 485, 2019/11

https://doi.org/10.1007/s10967-019-06696-2
 Times Cited Count：8 Percentile：52.78(Chemistry, Analytical)

We assessed the repeatability and reproducibility of methods for determining low dissolved radiocesium concentrations in freshwater in Fukushima. Twenty-one laboratories pre-concentrated three of 10 L samples by five different pre-concentration methods (prussian-blue-impregnated filter cartridges, coprecipitation with ammonium phosphomolybdate, evaporation, solid-phase extraction disks, and ion-exchange resin columns), and activity of radiocesium was measured. The z-scores for all of the $$^{137}$$Cs results were within $$pm$$2, indicating that the methods were accurate. The relative standard deviations (RSDs) indicating the variability in the results from different laboratories were larger than the RSDs indicating the variability in the results from each separate laboratory.

Journal Articles

Magnetic excitations and transport properties in frustrated ferromagnetic chain

Onishi, Hiroaki

Journal of Magnetism and Magnetic Materials, 479, p.88 - 90, 2019/06

https://doi.org/10.1016/j.jmmm.2019.02.006
 Times Cited Count：1 Percentile：3.36(Materials Science, Multidisciplinary)

Journal Articles

Summary of questions and answers part of the 2018 Japan Society of International Law (JSIL) Annual Conference's Session 1; The 50th Anniversary of the Adoption of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) and Nuclear Disarmament

Nakanishi, Hiroaki; Nakasone, Suguru*

Kokusaiho Gaiko Zasshi, 117(3), p.642 - 643, 2018/11

Summary of questions and answers part of the 2018 Japan Society of International Law (JSIL) Annual Conference's Session 1: The 50th Anniversary of the Adoption of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) and Nuclear Disarmament

Journal Articles

Study on current US views on bilateral civilian nuclear cooperation agreements

Tazaki, Makiko; Tamai, Hiroshi; Shimizu, Ryo; Kimura, Takashi; Kitade, Yuta; Nakanishi, Hiroaki; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-39-Kai Nenji Taikai Rombunshu (Internet), 7 Pages, 2018/11

no abstracts in English

Journal Articles

A Study on the tendencies on the member states from which Broader Conclusion (BC) has been drawn and on those from which BC has not been drawn yet by the International Atomic Energy Agency; Extracting possible requirements for drawing the BC

Nakanishi, Hiroaki; Kimura, Takashi; Shimizu, Ryo; Kitade, Yuta; Tazaki, Makiko; Tamai, Hiroshi; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-39-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2018/11

To extract the possible requirements for the Broader Conclusion (BC) drawn by the IAEA in the Member States, this study is to conduct the comparative analysis of the tendencies on the Member States from which the BC has been drawn and those from which the BC has not been drawn yet.

Journal Articles

Summary of research result of State Level Concept (SLC)

Kimura, Takashi; Tazaki, Makiko; Kitade, Yuta; Shimizu, Ryo; Tamai, Hiroshi; Nakanishi, Hiroaki; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-39-Kai Nenji Taikai Rombunshu (Internet), 5 Pages, 2018/11

This is the summary of research result of State Level Concept (SLC) which has been developed and conducted by the IAEA and a major purpose of the research reported here is to promote the nuclear operator's understandings for the importance of Broder Conclusion drawn continuously by the IAEA under SLC.

Journal Articles

Study on elements of establishing the regional safeguards

Kitade, Yuta; Tamai, Hiroshi; Tazaki, Makiko; Shimizu, Ryo; Kimura, Takashi; Nakanishi, Hiroaki; Suda, Kazunori

Nihon Kaku Busshitsu Kanri Gakkai Dai-39-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2018/11

Regional Safeguards is considered as one of the measures for strengthening IAEA safeguards and its concept is recognized at NPT Review Conference and also NSG Guidelines amended in 2011. This Study examines the elements for the proper establishment of Regional Safeguards.

Journal Articles

Electrochemical reaction mechanisms under various charge-discharge operating conditions for Li$$_{1.2}$$Ni$$_{0.13}$$Mn$$_{0.54}$$Co$$_{0.13}$$O$$_{2}$$ in a lithium-ion battery

Konishi, Hiroaki*; Hirano, Tatsumi*; Takamatsu, Daiko*; Gunji, Akira*; Feng, X.*; Furutsuki, Sho*; Okumura, Takafumi*; Terada, Shohei*; Tamura, Kazuhisa

Journal of Solid State Chemistry, 262, p.294 - 300, 2018/06

https://doi.org/10.1016/j.jssc.2018.03.028
 Times Cited Count：10 Percentile：43.96(Chemistry, Inorganic & Nuclear)

The potential in each state of charge (SOC) during charging of Li$$_{1.2}$$Ni$$_{0.13}$$Mn$$_{0.54}$$Co$$_{0.13}$$O$$_{2}$$ is higher than that during discharging. To clarify the effect of chargedischarge operating conditions on the electrochemical reaction, Li$$_{1.2}$$Ni$$_{0.13}$$Mn$$_{0.54}$$Co$$_{0.13}$$O$$_{2}$$ was charged and discharged under various charge-discharge operating ranges, and OCP, crystal structure, and oxidation states of the ransition metals were evaluated by electrochemical measurement, XRD, and XAFS. These results indicate that OCP, lattice parameters, and oxidation states of the transition metals of Li$$_{1.2}$$Ni$$_{0.13}$$Mn$$_{0.54}$$Co$$_{0.13}$$O$$_{2}$$ in each SOC are not constant. The XRD results indicate that two phases, namely, LiNi$$_{0.33}$$Mn$$_{0.33}$$Co$$_{0.33}$$O$$_{2}$$-like and Li$$_{2}$$MnO$$_{3}$$-like, exist in Li$$_{1.2}$$Ni$$_{0.13}$$Mn$$_{0.54}$$Co$$_{0.13}$$O$$_{2}$$.

Journal Articles

Dynamical quadrupole structure factor of frustrated ferromagnetic chain

Onishi, Hiroaki

Physica B; Condensed Matter, 536, p.346 - 349, 2018/05

https://doi.org/10.1016/j.physb.2017.10.056
 Times Cited Count：2 Percentile：8.07(Physics, Condensed Matter)

192 (Records 1-20 displayed on this page)